Trolley-wire support



- H. L. MI LLER.

TROLLEY WIRE SUPPORT.

APPLICATION HLED DEC-5,19I9.

1,389,773. r Patentdsept- 6, 1921.

2 HEETSSHEET 1.

H. L. MILLER.

TROLLEY WIRE SUPPORT. APPLICATION FILED 0120.5,1919.

Patented Sept. 6, 1921.

2 SHEETS-SHEET 2.

' face of the fixed jaw;

entree STATES PA ENT orrics.

HENRY L. M LLER, or KNOXVILLE, TENNESSEE.

TRoLLEY wIEE SUPPOR 1 i Specification of Letterslate nt.

Patented Sept. c.1921.

Application filed December 5, 1919. Serial No. 342,618.

To all whom it may concern: I

Be it known that I, HENRY L. MILLER, a citizen of the United States,residin at Knoxville, in the county of Knox and tate of Tennessee, haveinvented a new and useful Improvement in Trolley-Wire Supports,

The object of the invention is to provide.

asupport the parts of which may be cast and finished with aminimumamount of machine workand which shall be-so formed as toadaptthemfor ready and accurate adjustment upon each other and upon thetrol ley wire. i

In the accompanying drawings,

' Figurel is a side elevation of a trolley,

wire support embodying my improvement;

Fig. 2 1s a of the same support looktoward the right as shown in Fig. 1;

in Fig. 8 is an'upright section on theline,

3-3, of Fig. 1,, looking toward the right;

Fig. 4 is a perspective view of the two clamping .jaws separated fromthe upper member of the support;

Fig. 5 is a top view of the jaws shown in Fig. 4, the jaws beingseparated fromeach other;

Fig. 6 is an elevation showing the inner F 7 is an elevation showing theinner face of the adjustable jaw. Referring to said drawings, A is theupper member of the support. This is of ordinary form and adapted to besecured to a ceiling or the lower face of a hor1- zontal timber. Saidmember comprlses a downward-directed exteriorly screw threadedmetalneck, A which is embedded in non-conducting material, A andsurrounded by a metallic washer, A resting against the lower face of theinsulation material.

Below the member, A, are two jaws, B and C. The jaw, B, is immovablysecured to the neck, A and the jaw, C, isadjustably secured to the jaw,B, and the lower parts of the two jaws engage the trolley wire, E.

The two jaws nearlv meet in an upright plane in which lies the axis ofthe neck, A and the axis of the trolley wire, E. The

lower part of each jaw is extended laterally along thetrolley wire toextendthe surfaces which engage the wire. Along the inner face of thejaw, B, isa horizontal gr0ove, B adapted to receive aportion' of thetrolley wire. The jaw, C, has on its; inner face a'corresponding groove,G to receive. a part of thetrol-ley wire." At itsupper end, the jaw, B,has a lateral extension, B reaching across the above-mentioned, uprightplane. Said extension makes room' for formingan upright aperture, B ,;onthe axial line of the neck, A Saidaperture is of proper diameter and isinteriorly screw threaded to. allow the jaw to be screwed on the neck.The upper endv of the jaw, B, includin the extension, B is made flat andhorizontal to adapt it to bear fiatwise against the washer, A When thisjaw has been turned to raise it as far as said washer will permit, thejaw is immovable. The exposed lateral face of th-eextension, B is made apart of the surface of a-sphere havingits center in the axial line ofthe neck, A f

, On the inner faceof the upper part of the jaw, C, is a recess. orsemi-socket,' C conforming in reverse tothe rounded or spherical face ofthe extension, 13?. sion, B rests in said recess or socket. Thusasemi-ball and socket joint is formed. for the partial rotation of thejaw, C, in every direction.

A binding bolt, D, extends horizontally through apertures, D formed inthe'jaws, Band C, a little way below the extension, B and the socket, CWhen said bolt is tightened the inner face of the socket, C of the jaw,G, is pressed againstthe extension, B and the lower edge of the jaw, C,is pressed firmly against the wire, E whereby said wire is pressed into.the groove, B

gof the jaw, B.

The extenwhereby the jaw, C, must turn in a special manner to cause thetwojaws to fully grip necks 'A1 untilsaid' 'aws are rl id.

,and oneof said jaws being formed for at-:

tachment to a superposed" member and havpositions.

the trolley wire. 7

I have found in practice that the two jaws may be so cast as to requireno more machining than the tapping of the aperture, 13 and in some casesthegrinding of the upper end of the jaw 13, and the cleaning of thegrooves, B and C 7 i w F or the, placing of a trolley wire, the members,A, are secured in the desired positions. Then the jaws, B, are appliedto the Then each jaw,C, is applied loosely to the companion' aw, B, Thenthe wire, A, is strung along the line of supports and put'into position'between the jaws and in the jaw grooves of the supports. Atea'chs'upport, the bolt is tightened only sufiiciently to keep the wirefrom falling. Then the wire is adj usted endwise until it has beenbrought into' its final position.- Then'th'e bolts aretighte'ne'd tobring the jaws, G, into their final It is to be noted the extension, 13on the jaw, B, constitutes thesupport for thei j aw, G, the bolt, D,serving merely-to draw the jaw, C", laterally', the jaw turning on theextension, B The jaw, (loan not move downward so long as the-extension,B is engaged in the socket, C Furthermore, the

bolt, D,'is preferably nadeloose in the apertures, D in order'that'thebolt may shift in said apertures suiiiciently'to allow the jaw, C, toswingand turn on the extension, B on the semi-universal joint.

I claim as my invention, 4

1. In a support ofjthe nature described, the combination of a pair ofjaws having their loweredges adapted to grip a wire,

ing a single lateral extension and the other aw'havmg a socket toreceive said extension, whereby a' semi-universal joint is sion andsocket and acting. horizontally, for

drawing, said jaws toward each other, substantially a'S described. 2. Ina support of the nature described, the combination of a pair of jawshaving their lower edges adapted to grip a wire, and one of said jawshaving a single lateral extension in which is an upright interiorlyscrew-threaded aperture and theother jaw having a socket to receive saidextension, wherebya semi-universal joint is formed, and'means locatedbelow said extension and socket and acting horizontally for drawing saidjaws toward each, other, substantially as described.

'3; In "a support of the nature described,

the combinationof a pair-of jaws having sion, whereby a semi-universaljoint is formed,'and each of said jaws'having a transverse aperture, anda binding bolt ex- 7 tending through the apertures, substantially asdescribed. H

4. In a support ofthe nature described, the combination of a pair ofjaws having their lower edges adaptedto grip a wire,

and one of said jaws having a single'l'ateral' V 7 extension in which isan upright interiorly screw-threaded apertureand the other aw having asocket tOIGCBlVG said extension,

. whereby a semi-universal joint-is formed,

and each of said jaws having a transverse aperture, and a binding boltextending through the apertures, scribed. I

In testimony whereof I have signed my name, this 3rd day of December,inthe year substantially as .de-

one thousand nine hundred and nineteen. V

HENRY V

